import java.util.*;

public class Messages3 {
    public static void main(String[] args){
        Map<String,String> messages=new TreeMap<>((s1,s2) -> -s1.compareTo(s2));

        messages.put("Justin","Hello!Justin的信息！");
        messages.put("Monica","给Monica的悄悄话！");
        messages.put("Irene","Irene的可爱猫喵喵叫！");
        System.out.println(messages);
    }
}
